Brush belt removing means for vacuum cleaners



Nov. 4, 1952 c. s. DAYTON BRUSH BELT REMOVING MEANS FOR VACUUM CLEANERS Filed Sept. 3. 1947 2 SHEETS-SHEET 1 Fig. 4.

Inventor. Car! S.Da ton,

is Attorngs.

Nov. 4, 1952 c. S/DAYTON BRUSH BELT REMOVING MEANS FOR VACUUM CLEANERS 2 SHEETSSHEET 2 Filed Sept. 5, 1947 His At'bornqg.

Investor:

Patented Nov. 4, 1952 BRUSH BELT REMOVING MEANS FOR- VACUUM CLEANERS Carl S. Dayton, Bridgeport, Conn., assignor to General Electric Company, a corporation of New York Application September 3, 1947, Serial No. 771,884

' 12 Claims. (Cl. 15-332) The present invention relates to vacuum cleaners of the type wherein a rotating cleaning element such as a brush (and hereinafter referred to as a brush) is positioned in the vacuum cleaner floor nozzle and is driven by a belt from the motor which drives thevacuum cleaner fan, and wherein openings are provided in the vacuum cleaner casing to receive what is. termed usually a con- Verter tube to enable a suction hose and a cleaning tool attached thereto to be substituted for the cleaner nozzle. Arrangements of this kind are well-known in the vacuum cleaner art.

In vacuum cleaners of this type, it is desirable to remove the belt from the motor shaft when using the suction hose so the brush is not turned and the object of my invention is to provide an improved construction and arrangement for performing this function which is simple in structure and easy and convenient to use.

For a consideration of what I believe to be novel and my invention, attention is directed to the following specification and to the claims appended thereto. i I

In' the drawing, Fig. 1 is a front view, partly broken away, of a portion of a vacuum cleaner; Fig. 2 is a sectional view of the front end'of the vacuum cleaner structure shown in Fig. 1; Fig. 3 is a view similar to Fig. 2 showing the parts in a different position; Fig. 4 i's-a detail front view with the front coverplate broken away; Fig. 5 is a view similar to Fig. 2 of a, modification; Fig. 6 is a view similar to Fig. 2 of a further modification; Fig. 7 is a side view, partly brokenaway, of still another modification; Fig. 8 is a face view of Fig. I with the coverplate removed and certain parts of the cleaner structure omitted for purposes of clearness; and Fig. 9 is adetail view of a part of the structure shown in Figs. 7 and 8.

Referring to the drawing, I indicates the motor of a vacuum cleaner, 2 the fan housing and 3 the suction inlet chamber having the suction nozzle 4 provided with a transverse suction slot 5. In the'fan casing is a fan 6' fixed to motor shaft I. The motor shaft projects out'through an inlet opening 8 in the front'wall 9 of the fan chamber (also the rear wall 'of the suction-chamber) into the suction chamber *3. Insuction nozzle 4 is a rotating cleaning element 10- here shown as a brush, which at its ends is suitably journaled in the end walls of nozzle 4. The brush is driven from fan motor I by a belt II which passes over the end of the motor shaft and around a pulley I2 on the brush shaft. In the front wall I3 of the suction chamber is an opening I4 in line with inlet opening 8. Opening I4 is covered normally by a coverplate [5, the coverplate in the present instance being shown as pivoted at its lower end on a pivot pin I 6.

The structure so far described is a known one and is to be taken as typical of new suitable vacuum cleaner construction. In the drawing only a sufficient portion of the cleaner is shown as is needed to illustrate my invention. In such cleaners when a suction hose and attachments are to be used, the coverplate I5 is removed from in front of opening M, the belt is removed from the end of the motor shaft and a converter tube as shown at I! in Fig. 3 is inserted through opening I4 and into opening 8 in the front wall and the fan chamber. The converter tube blocks off communication between suction slot 5 and opening 8. A suction hose for cleaning can be attached to converter tube I'I. Afterwards, when use of the suction hose is finished and the converter tube is removed, the belt must be again put back over the end of the motor shaft.

My invention has to do particularly with an improved construction and arrangement for removing the belt from and replacing it on the motor shaft end whereby the operation can be performed easily and quickly by the user.

According to my invention, I provide a pin to which the upper end of the belt may be transferred from the motor shaft end and then it and the belt moved out of alignment with openings I4 and 8, the arrangement bein such that the belt can be readily moved back again from the pin to the shaft end.

According to the embodiment of my invention shown in Figs. 1 to 4, coverplate I5 is provided with an axially projecting pin attached to its inner surface which comprises in this form of the invention a sleeve I8 rotatably mounted on a stud I9 which threads into a boss on the coverplate. The pin stands in line with the end of motor shaft I but is not in engagement therewith. When the converter tube is to be placed through openings I4 and 8, belt II is transferred from the end of motor shaft I to sleeve I8 after which the coverplate is swung down to a position as shown in Fig. 3. This moves the belt out of alignment with openings I4 and 8 so that the converter tube can be positioned in the openings.

In the arrangement shown in Figs. 1 to 4, for transferring the belt from the shaft to the pin, I take advantage of the fact that when motor shaft 1 is turned backwards, i. e. in a counterclockwise direction as indicated by the arrow in Fig. 1, the belt is run from the shaft end onto the sleeve. Thisoccurs because'the belt has a right-angle twist due to shaft 1 being at a right angle to brush Hi. Due to the twist in the belt, when the motor shaft operates in its normal forward direction, i. e. clockwise as viewed from the front end, the belt tends to run back on the shaft. But when operated in the other direction the belt tends to. run off. the shaft. Fortiirningfshaftf'l to run the'belt fromthe shaft onto s'l'eeve I8 (and vice versa) I provide a cylinder 20 journaled at one end in coverplate I5 and at the other end in a bracket 25 carried by thecoverplate, The, cylinder has a longitudinally extending n c. t clr2 i1. which normally stands in line witlr the top of the belt so that the cylinder is no tfinfeng*agement With the belt. On the front of 'th cylllidr is e '15 knob or handle 23 by means of which it may be turned. When it is desiredfto tr'ansfrjthe belti from the motor shaft to sleeve I8, knob 23 is turned in a clockwise direction as viewdirfFig. 1 t to bring cylinder 26 intoengagement with the top surface of' belt "I rand through itt'urn"shaft 1 backwards, the friction between the c'ylinderand the surface of the belt being sufiicie'ntto 'eifect the turning of the motor shaft. This causes 'the belt to travel from the shaftend onto si eve I8. Cylinder 25 is of a diamet'r with: respect tofthe diameter of shaft 'i'that'a half turn of the cylinder turns shaft"! an amount sufficient tdeffect movement of the belt from the shaft end to the sleeve.

Preferably thecover l 5 is1ocked c losed nor mally by a vertically sliding latch or bar 24 The lower end of the bar rests onthe surface 'of cylinder 20. It slides in openings in bracke't'2l. When in locking position itsfupperjendispositioned behind the front wall l3 at thetop of opening 14. When cylinder 20 is turnedj a hal'f turn notch 22 is brought into line with bar" 24 whereupon the bar dropsdown into the notch as shown in Fig. 3 so that'it is moved from looking position. Cover [5 may be' now swung on its pivot l5 from the position ShOWIIiII FigL Z down to the position shown in Fig. 3. As shown in Fig. 1 a notch 25 is provided at the'lower end of opening I4 through which the belt extends when moved from the Fig. 2 position to the Fig: 3 position.' At the upper' end of'o'pening I4- is a notch 25 through which bracket 2| and bar' 24 pass/ With the parts in the'p'osition shown in Fig. 3 a converter tube can be inserted through opening I4 into opening 8-as show n in Fig. 3. The converter tube may be held intheopenings by a catch (not shown) or other suitable means.

To return the belt to its normal position coverplate I 5 is closed i. e. moved back to its Fig. 2 position, after which knob 23 is utilized to turn sleeve 18 through friction contact with the top surface of the belt to roll the belt back onto shaft i. This requires a half turn of cylinder 20 in a direction opposite to that required for removing the belt from the shaft end to the sleeve. When cylinder 20 is turned, bar 24 is lifted out of notch 22 to its Fig. 2 position to again lock the ,cover in closed position.

By my invention, it will be seen that thebelt can be quickly and easily removed from the shaft end when hose attachments are to be used and later quickly and easily replaced on the shaft end; and that in replacing the belt it willbereplaced with the quarter twist in the correct direction for keeping the belt on the motor shaft when the motor is running.

In Fig. 5 is shown a modification wherein the belt is transferred from theshaft' end to the pin by means of a spider 26 carried by'a rod 2'! which slides in openings in cover 28 and a bracket 29 carried by the cover. The pin, indicated at 30, is a solid pin carried by cover 28. With this arrangement the belt may be transferred from the shaft end to pin 30 by pulling outward on a knob 3| on the end of rod 21 the upper end of the, belt beingjfirioved byltlfeispidemh ari obvious manner. 2 The belt may be mhvd 'fi'om the pin back onto the shaft end by pushing knob 3| inward. For locking cover 28 closed, I provide a latch tf g norrnally held upward in locking position asshown in Fig. 5 by a spring 33. Engaging ahead on the lower end of latch 32 is one end of afpiyot" lever 34 he other end of which is provided WI 1 35 adapted to be engaged by a, projection 36 on rod 21. Projection 36 is so positioned. with. respect to ear 35 that when rod 21 reaches its outermost position i. e. the position'ih which the belt has been transferred from the motor shaft end to pin 30, the projection engages earss to move latch 32 downward out of locking position. The cover can then be swung down on" its hinge after the manner shownin Fig; 3 to move'the belt'out of alignment with openingslfandil;

'In' Fig; '6 is shown a further modification. of my inventionwherein the cylinder lunch-Figs- 1 to 4 is omitted, the motor shaft being turned manually to transfer the belt fromthe shaft-end to'the pm. In this'co'nstruction, the coverplate. 31 is pivoted on the front-of the Vacuum cleaner nozzle as shown at 38- andseparately mountedl=on the same pivot is a bracket 39f-which carries .the pin lfl which in this case is' similar to the pin of Figs. 1 to 4. With this" modificationcoverplate 31 is firstswung down on'its pivot after which the belt is turnedmanually in the proper direction either by grasping and turning the-beltitsel'f or by turning the brush to transfer the beltfrom the motor shaft end :to the pin afterthe manner already described-in connectionwithFigsr Lt'oA. After the belt has been transferred-to pin 40, bracket 39 is turned outwardly on its pivot. to move'lthe belt down to a position corresponding to'that shownin Fig. 3; The parts arerestored to their normal positions-by first turningbracket 33-back to the Fig. 6 position, then transferring the belt from the pin back to the motorv shaft endby turning the belt manuallyin theproper direction, and then closingcbyer 31.

In Figs. 7; 8;ahd 9 is.shown..a.form.of.theine vention wherein the pintowhich the beltendis transferred, instead of being swung outwardly.

through'theopening in the frontwall of the suc.-, ti'on chamber in the plane of. the axis ofethe niotor'shaft, is swung sidewisein a plane at right angles to the axis of the motor shaft. Inthis construction, the pin to which the. belt end. isv transferred comprises alsleeve lfi mounted on a tubularSstud-46 fixed to the upper end of-a lever arm 41'. Sleeve 45-ihas an axially extending .cen: ter post 'd8'gwh-ich projects-through stud Afitothe front 4 side fof -lever arm 411. and on itsend-it v,is provided with a'knob 48 Between knobAB. and the adjacent surface of the lever. arm 41.15.21. compression spring 49-1which biases sleeved? 1011i)? wardly-to the position showninFig. 7 whereinits innerend engages the surfaceof-lever.armAl and its outer'end is out of engagement with. the motor shaft end 50. By means of knob 48,. sleeve .45 can bemove'd axiallyon'stud 46 to bring itsendinto engagement with the motor shaft erid and it can bet'urned on the stud; The facing ends of sleeve 45and motor shaftend 50 are provided with.suit-. able' clutch ineans'such; as the engagingteetl'l Eli indicated in Fig. 7, whereby when the sleeve is pushed inwardly into engagement with the shaft end, the motor shaft may be rotated by turning button 48.

Lever arm 41 is pivotally mounted between its ends on the upper end of a bracket 52, as is indicated at 53. Bracket 52 is fixed to the front nozzle wall 54. The lower end of lever arm 41 has an angular end 55 pivotally connected at 56 to the upper end of a rod 51 which forms a part of an over center spring toggle. The lower end of rod 51 projects through an opening in an inturned ear 58 which forms a part of bracket 52. Between ear 58 and a shoulder on rod'5'l is a compression spring 59. At :60 is a stationary shaft or bar which projects across the vacuum cleaner nozzle at one side of the vacuum cleaner belt 6|, it being fixed at its ends in the front and rear nozzle walls. It forms a stop for lever arm 4! and also a guide over which the belt is bent. The opening in the front wall of the suction chamber is indicated at 62 and the pivoted cover for such opening is indicated at 63, the latter being normally held closed by a suitable catch (not shown) which may be actuated by a knob 64. At the side of opening 62 is a recess 65.

Normally, the parts stand in the positions shown in Fig. '7 and in full lines in Fig. 8 wherein toggle spring 59 holds the lever arm 41 against shaft 59 with sleeve 45in axial alignment with shaft end 50, shaft 60 forming a stop for the lever arm. When attachments are to be used, coverplate 63 is moved away from in front of opening 52 and the end of sleeve 45 is moved into clutching engagement with the end of shaft 5B. This may be done by pressing in on knob 48. Knob 48' is now turned in a counterclockwise direction to turn shaft end 50 whereby the belt will be caused to move from shaft end 50 onto sleeve 45 in the manner already described in connection with Figs. 1 to 4. After the belt end has been transferred to sleeve 45, lever arm 4! is turned in a counterclockwise direction, as viewed from the front of the cleaner to move the lever arm and belt to a position where they are out of line with opening 62. This is indicated in dotted lines in Fig. 8.. During this movement, the belt is bent across shaft 60 after the manner indicated in Fig. 9 so as to keep the belt lined upon the brush pulley. When lever arm 4'? is moved from the position shown in full lines in Fig. 8 to the position shown in dotted lines, the spring-pressed toggle is moved from the one side of the center line through pivot 53 and the opening in car 58 to the dotted line position across to the other side of such center line. Recess 85 serves to accommodate knob 49 when lever arm 41 is moved to its dotted line position. Toggle spring now holds the lever arm against shaft 65, as indicated in dotted lines in Fig. 8, to limit movement of the lever in this direction.

A suction or converter tube may now be positioned in the cleaner nozzle after the manner shown in Fig. 3.

To restore the parts to their normal positions, the suction tube or converter is removed from the nozzle, after which lever arm 41 is moved from the dotted line position shown in Fig. 8 back to its full line position where sleeve 45 is in line with shaft end 50. Knob 48 is then pressed inward to connect sleeve 45 to shaft end 58, after which the knob and sleeve are turned in a clockwise direction to cause the belt to run back onto the shaft 8. After the belt is restored 6 to the shaft end, the knob isreleased and cover 62 closed.

What I claim as new and desire to secure Letters Patent of the United States is:

1. In a vacuum cleaner having walls which define a suction chamber and a nozzle, said walls being provided with aligned openings to receive a converter tube, a fan shaft having a cylindrical end which projects through one of said openings into the suction chamber in the area between the openings, a rotating cleaning member in said nozzle with its axis at right angles to the fan shaft axis, and a belt connecting the cleaning member to the shaft end, belt removing means comprising a rotatable cylindrical sleeve of substantially the same diameter as the shaft, said sleeve being movable between a position in which it is axially aligned with the shaft end and another position outside of the area between the openings, and means for shifting the belt between said shaft and said sleeve whereby the belt may be readily shifted from the shaft end to the sleeve and moved away from the area between the suction chamber wall openings, to permit the unobstructed insertion of a converter tube in the openings.

2. In a vacuum cleaner with a body having a nozzle, a suction chamber the front and rear walls of which are provided with aligned openings to receive a converter tube, a motor shaft having an end which projects through one of said openings into the suction chamber, a rotatin cleaning member in the nozzle, and a belt connecting the cleaning member to the shaft end, belt removing means comprising a pin of substantially the same diameter as said shaft and which stands normally in line with the shaft end, means for transferring the belt from the shaft end axially of the shaft to the pin, and a pivoted member on the cleaner body, said member carrying the pin and being turnable on its pivot to move the belt and pin out of alignment with the openings after the belt has been transferred from the shaft end to the pin.

3. In a vacuum cleaner having walls which define a suction chamber and a nozzle, said walls being provided with aligned openings to receive a converter tube, a motor shaft having an end which projects through one of said openings into the suction chamber, a rotating cleaning member in the nozzle the axis of which is at a right angle to the axis of the shaft end, and a belt connecting the cleaning member to the shaft end, belt removing means comprising a pivoted member on a wall of the suction chamber adapted to be swung from a position in line with said openings to a position out of line therewith, and a rotatable sleeve of substantially the same diameter of said shaft, said sleeve being carried by said pivoted member, said sleeves When the pivoted member is in front of said openings, standing in axial alignment with said motor shaft end whereby by turning the motor shaft the belt may be transferred from the shaft end to the sleeve and by turning the sleeve the belt may be transferred from the sleeve to the shaft en 4. In a vacuum cleaner having walls which define a suction chamber and a nozzle, said walls being provided with aligned openings to receive a converter tube, a motor shaft having an end which projects through one of said openings into the suction chamber, a rotating cleaning member in the nozzle the axis of which is at a right anglesto the axis'of the'shaft end,and a belt connectingthecleaning member tor the shaft end, belt removing means comprisinga. pivoted member. on a wall of the suction chamber adapted to be. swungfrom. aiposition in-. line. with said openings: to a position.- out of? line-therewith, a. rotatable .sleeve of" substantially= the.= same: diameter as said. motorrshaft; said: sleeve being carried: b said pivoted member; said sleeve, when the pivoted member is in front. oflsaid openings, standingin lineiwith saidl-motor shaft end ini a; position: to: hat/either. belt transferred axially ofrjthe. shaft from theeshaft end to-- said sleeve; and. means for, turning themotor shaft and the. sleeve... for transferring-= the. belt: back and; forth: between the: motor. shaft=- end .:-and the sleeve;

In. aevacuum;cleanenhaving a? nozzle; with a suction chamber: the. front: and rear walls?v of which: are: provided with aligned openings to. ..receive' a; converter.- tube, almctonshafte having;- an end; which projects. through. one of; said openingsinto the. suctionrchamber, a. rotating cleane ing member invthe nozzle,. and abelt: connecting the cleaning. membeu to the. shaft: end, belt: removing means. comprising a. rotatable. sleeve which stands normall tinilmeiwithe theshaft I end-J and; has. a diameter; substantially thesame as. said: shaft; means: for: transferring 13116213811; axially; of: the shaft. from theshaftiendztothe sleeve, .alpivotedamembenwhich carriesithesleeve ancrisj'turnableson: its -.pivotiatoimoveethebeltand sleeve out-of, alignment: with the openings-latter the: belt; has been transferred from the rshaf t end to theisleeve, andzaicoverplata fon theropening in th frontwall'. of: the. suction :chamber;

6.1 In a. vacuum 1. cleaner having; a-inozzl'epwitha. suction chamber theafronti. andi ream walls; of: which, area provii'ded: with; aligned; openingss to receivea converter tube; a motoreshaftf. having an .end which projects zthroug-h lone ofsaidppene ings into .the. suction chamber; alrotating -clean ing msmbier ini the nozzle; and-r a. belticon-necting thelcleaningi. member toitha shaft: end; belt removing means comprising a rotatableasleeve of substantially the-samefdiameten asstheshaft and which stander: normally.-. in. line-- with-= the shaft end; means, forrtransferring; the belt -axiallyof the, shaft from theshaft ..-end-. to the sleeve; and a; pivoted; member which carries; the: sleeve-and is lturnable; on its-pivotin .planeiat: right-angles to. ,tha. of, theemotor: shaft to .move: the belt and sleeve. outpfaligmnentnvith the openings after.- the; belt-.hasl been. transferred 2 from the shaft end to the sleeve.

7; line vacuum cleaner having -a nozzle with a suction .clramber theflfront and rear walls ofwhich are. provided with aligned:openings-ito=-re-- ceive. a converter tube, a.motorsshaft having arr end which projects .through one of said openings into thetsuction chamber, a rotatin cleaning memberin the nozzle,.and= a b'elt-connecting-the. clearing member to thesshaft end; belt removing means .comprising; a.-.. pin standings normally in line Viithiathfi: shaft: end; means for-shifting the belt between-said shaft-and 'said pi-ma -lever: arm

for. the pin; pivoted to: turm ins a;- plane-zat rig-ht angiesto the axis of the shaft for moving the pin -.out of and: into alignmentwith said I shaft end, and a spring presseditoggle for?said -lever- 81111..

8. In a, vacuum .cleanemhaving-a nozzle -wi-th a suction chamber. theiront and *rea-r walls of which are.providedv with alignedsopenings-to receive; a, converter; tube, a.- ;motorshaft::,ha:1 ing an .into: the suction chamber; a. rotating cleaning member-inzthe nozzle .w-ithits axis-at right: angles totheshaftaxis, anda belt connecting the clean ing member to the shaft end, belt. removing means comprising a lever arm pivoted to turnin aplane-at right angles to the axis of: said shaft end; a. rotatable sleeve carried by the lever arm which stands normally in axial alignment. but out-otcontact. with said shaft end, and aknob fonmovingthe sleeve. axially; into clutching en:- gagement withthe motor shaftend and'forturn'e ingsuch shaft end to. transfer: the beltfrom the shaft .end': to: the sleeveand vice versa.

9.. In a. vacuum cleaner havin a..nozzle-. with a suctionchamber the front-and rears-wallsof which .-are-. provided with'aligned openings-to re.- ceivea converter tube, a motor shaft. having'an end which projects through one of said openings intothesuction chamber, arotating-cleaning: member in the. nozzle with itsaxisatright anglesto the shaft axis, and a belt connecting thesoleaningmember to the. shaft end, belt-removing. means comprising a lever arm pivoted'to turndn a plane at right angles to the axis .ofsaid shaft end, a rotatable sleeve carried by the lever arm which stands normally. in axial? alignment butout' ofcontact with said shaft end, a knob for moving, the sleeve axiallyinto clutching en: gagement with the motor. shaft end and for turning. suchshaft end to transfer the belt from the shaft endtov thesleeve and vice versa, and spring means for holding said lever arm in a. position where the: sleeve is in alignment. with said shait'end or optionally-in a position where the. lever arm. and sleeve.v are out of alignment with said openings.

10;, In; a; vacuum cleaner having a nozzle with a.-,.suction chamber the front'and rear; walls of whichare provided with aligned openings to res ceivea converter tube, a I motor shaft ,ha.ving an end which; projects throughone, of said openings into the: suction chamber; a rotating cleaning ngemberjngthe nozzle, withits axis at rightangles to; the shaft axis, a d a: belt connecting the clea ;ngmember to; theshaft end, belt removeanscomprising. a leverarm pivoted to turn plane at right angles to the, axisof said sl aftend, a rotatable sleeve: carried by thelever arm which stands normally in axial alignment bu-tout of contact with said shaft end, a knob for moyingth sleeve axially into clutching engagemen-t with-the motor shaft end and for turning such shaft, end'to transfer-the belt from the shaft end to the sleeve and vice versa, and a member over which the; belt bends to hold the belt on the cleaning member when the lever, arm isturned to move: it and thesleeve out of align: mentwith said openings.

11. In ,a vacuum cleaner having a nozzle, with a; suction chamber the front. and rear walls of which are provided. with aligned openings to ree ceive. aconverter tube, a motorshaft havingan end which projects through one of said openings into the suction chamber, a rotating. cleaning member in the nozzle with its axis at right angles to the shaft axis, and a belt connecting the cleaning member to the shaft end, belt removing means comprising a lever arm pivoted to turn in a plane at rightangles to the axis of said:

shaft end; a rotatable sleeve carried by-the lever arm Whichstands normally in axial alignment but*out-of-contactwith saidshaft end, a knobform-oving the sleeveaxially-into clutch-ingengagement with the motor shaft endand-for end;whicbmtoiectsi hr ush one mhseid p nineaJe, u mgsucnshaft'end to transfer the beitifm the shaft end to the sleeve and vice versa, a member over which the belt bends to hold the belt on the cleaning member when the lever arm is turned to move it and the sleeve out of alignment with said openings, and means for holding said lever arm in a position wherein th sleeve is in axial alignment with said motor shaft end and in another position wherein said sleeve and lever arm are out of alignment with said openings.

12. In a vacuum cleaner having a nozzle with a suction chamber the front and rear walls of which are provided With aligned openings to receive a converter tube, a motor shaft having an end which projects through one of said openings into the suction chamber, a rotating cleaning member in the nozzle with its axis at right angles to the shalt axis, and a belt connecting the cleaning member to the shaft end, belt removing means comprising a lever arm pivoted to turn in a plane at right angles to the axis of said shaft end, a rotatable sleeve carried by the lever arm which stands normally in axial alignment but out of contact with said shaft end, a knob for moving the sleeve axially into clutching engagement with the motor shaft end and for turning such shaft end to transfer the belt from the shaft end to the sleeve and vice versa,

10 a member over which the belt bends to hold the belt on the cleaning member when the lever arm is turned to move it and the sleeve out of alignment with said openings, and a spring toggle and stop mechanism for holding said lever arm in a position wherein the sleeve is in axial alignment with said motor shaft end and in another position wherein said sleeve and lever arm are out of alignment with said openings.

CARL S. DAYTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 340,629 Silver Apr. 27, 1886 1,182,595 Stecker May 9, 1916 1,332,235 Staples Mar. 2, 1920 1,726,592 Spanel Sept. 3, 1929 1,900,692 Clements Mar. '7, 1933 2,094,133 White Sept. 28, 1937 2,322,233 Coss June 22, 1943 FOREIGN PATENTS Number Country Date 138,433 Great Britain Feb. 12, 1920 

